i5-11400 vs i7-8665U

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Aggregate performance score

Core i7-8665U
2019
4 cores / 8 threads, 15 Watt
3.93
Core i5-11400
2021
6 cores / 12 threads, 65 Watt
10.70
+172%

Core i5-11400 outperforms Core i7-8665U by a whopping 172% based on our aggregate benchmark results.

Primary details

Comparing Core i7-8665U and Core i5-11400 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking1445735
Place by popularitynot in top-100not in top-100
Market segmentLaptopDesktop processor
SeriesIntel Core i7no data
Power efficiency24.7915.58
Architecture codenameWhiskey Lake-U (2018−2019)Rocket Lake (2021)
Release date16 April 2019 (5 years ago)16 March 2021 (3 years ago)
Launch price (MSRP)$409no data

Detailed specifications

Core i7-8665U and Core i5-11400 basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores4 (Quad-Core)6 (Hexa-Core)
Threads812
Base clock speed1.9 GHz2.6 GHz
Boost clock speed4.8 GHz4.4 GHz
Bus typeOPIno data
Bus rate4 GT/s8 GT/s
Multiplier19no data
L1 cache256 KB64K (per core)
L2 cache1 MB256K (per core)
L3 cache8 MB (shared)12 MB (shared)
Chip lithography14 nm14 nm
Maximum core temperature100 °C100 °C
Maximum case temperature (TCase)no data72 °C
64 bit support++
Windows 11 compatibility++

Compatibility

Information on Core i7-8665U and Core i5-11400 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration1 (Uniprocessor)1
SocketFCBGA1528FCLGA1200
Power consumption (TDP)15 Watt65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-8665U and Core i5-11400. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512
AES-NI++
AVX++
Enhanced SpeedStep (EIST)++
Speed Shift+no data
My WiFi+no data
Turbo Boost Technology2.02.0
Hyper-Threading Technology++
TSX++
Idle States++
Thermal Monitoring++
Flex Memory Access+no data
SIPP+-
Smart Response+no data
Turbo Boost Max 3.0no data-
Deep Learning Boost-+

Security technologies

Core i7-8665U and Core i5-11400 technologies aimed at improving security, for example, by protecting against hacks.

TXT++
EDB++
Secure Key++
MPX+-
Identity Protection++
SGXYes with Intel® ME-
OS Guard++

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-8665U and Core i5-11400 are enumerated here.

AMD-V+-
VT-d++
VT-x++
EPT++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-8665U and Core i5-11400. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4DDR4-3200
Maximum memory size64 GB128 GB
Max memory channels22
Maximum memory bandwidth38.397 GB/s50 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card
Compare
Intel UHD Graphics for 8th Generation Intel ProcessorsIntel UHD Graphics 730
Max video memory32 GB64 GB
Quick Sync Video++
Clear Video++
Clear Video HD++
Graphics max frequency1.15 GHz1.3 GHz
Execution Unitsno data24
InTru 3Dno data+

Graphics interfaces

Available interfaces and connections of Core i7-8665U and Core i5-11400 integrated GPUs.

Number of displays supported33
eDP+no data
DisplayPort+-
HDMI+-
DVI+no data

Graphics image quality

Maximum display resolutions supported by Core i7-8665U and Core i5-11400 integrated GPUs, including resolutions over different interfaces.

4K resolution support++
Max resolution over HDMI 1.44096 x 2304@24Hz4096x2160@60Hz
Max resolution over eDP4096 x 2304@60Hz5120 x 3200 @60Hz
Max resolution over DisplayPort4096 x 2304@60Hz5120 x 3200 @60Hz

Graphics API support

APIs supported by Core i7-8665U and Core i5-11400 integrated GPUs, sometimes API versions are included.

DirectX1212.1
OpenGL4.54.5

Peripherals

Specifications and connection of peripherals supported by Core i7-8665U and Core i5-11400.

PCIe version3.04.0
PCI Express lanes1620

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.


Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

i7-8665U 3.93
i5-11400 10.70
+172%

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

i7-8665U 6247
i5-11400 16990
+172%

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

i7-8665U 765
i5-11400 1964
+157%

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

i7-8665U 2425
i5-11400 7298
+201%

Gaming performance

Pros & cons summary


Performance score 3.93 10.70
Integrated graphics card 5.58 4.16
Recency 16 April 2019 16 March 2021
Physical cores 4 6
Threads 8 12
Power consumption (TDP) 15 Watt 65 Watt

i7-8665U has 34.1% faster integrated GPU, and 333.3% lower power consumption.

i5-11400, on the other hand, has a 172.3% higher aggregate performance score, an age advantage of 1 year, and 50% more physical cores and 50% more threads.

The Core i5-11400 is our recommended choice as it beats the Core i7-8665U in performance tests.

Be aware that Core i7-8665U is a notebook processor while Core i5-11400 is a desktop one.


Should you still have questions on choice between Core i7-8665U and Core i5-11400, ask them in Comments section, and we shall answer.

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Intel Core i7-8665U
Core i7-8665U
Intel Core i5-11400
Core i5-11400

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Community ratings

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Questions & comments

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